Thanks for the shura's introduction I come to here.
I didn't know this kind of topic already exists.
I shows this kind things in my other post here http://forums.sketchucation.com/viewtopic.php?f=289&t=30749#p270444
You guys in this topics might be interested in.
I did that all in DC formulas.
And here I attach some of images from my post.
From above post you can download SU file.
spiral_02.jpg
spiral_03.jpg